S1: Iguanodon was one of the first dinosaurs to be scientifically described.

S6: This quadrupedal dinosaur lived about 70 million years ago and its fossils are found in many parts of England, Europe, Asia and North Africa.

P: These teeth formed a dental battery in which replacing teeth were constantly growing.

Q: The fore limbs were slightly larger than other members of its group known as Ornithischia.

R: It had numerous teeth in the sides of the jaws, arranged in rows.

S: It was about 40 feet in length.

The proper sequence should be

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